bc12: Limit max current to 1.5A

The Type-C specification now prohibits proprietary methods for BC 1.2
to be used over Type-C.  In effect, this limits the maximum current
for legacy chargers to be 1.5A.  Technically, proprietary methods are
not allowed, however we'll continue to allow them but limiting their
maximum current to 1.5A.

This commit changes the maximum current of our BC 1.2 detectors to be
1.5A for all suppliers that would have reported higher capabilities.

For more information, see the USB Type-C Engineering Change Request
titled "Removal of Proprietary Charging Methods".

BUG=b:155337959
BRANCH=hatch,kukui,kevin
TEST=Build and flash waddledee, verify that legacy supplier is limited
to 1.5A.
TEST=`make -j buildall`

Signed-off-by: Aseda Aboagye <aaboagye@google.com>
Change-Id: Ifb8dbde519cd2efe17a27197460291708bef125c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2172777
Tested-by: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: Jett Rink <jettrink@chromium.org>
Commit-Queue: Aseda Aboagye <aaboagye@chromium.org>

0 files changed, 0 insertions, 0 deletions